"The Prophet ordered placing the hands (on the ground) keeping the feet erect. (by resting feet on the toes and making the tips of the toes facing the Qiblah)."  

أَنَّ النَّبِيَّ ﷺ أَمَرَ بِوَضْعِ الْيَدَيْنِ وَنَصْبِ الْقَدَمَيْنِ  

"The Prophet ordered placing the hands (on the ground)." And he mentioned in it: "From his father."  

أَنَّ النَّبِيَّ ﷺ أَمَرَ بِوَضْعِ الْيَدَيْنِ فَذَكَرَ نَحْوَهُ وَلَمْ يَذْكُرْ فِيهِ عَنْ أَبِيهِ